Journal
THIN SOLID FILMS
Volume 472, Issue 1-2, Pages 5-10Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2004.05.096
Keywords
indium sulfide; thermal annealing; thin films; structural transition; deposition process; optical properties; structural properties; chalcogens; chemical deposition; chalcogenides
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Polycrystalline In2S3 films were grown on glass substrates by means of the chemical bath method and subsequently thermal-annealed in an Ar atmosphere at temperatures from 200 to 450 degreesC. The optical and structural properties of the films were studied as a function of the annealing temperature. The experimental results show that the as-deposited films are composed by a mixture of both cubic alpha and beta crystalline phases, with some fraction of tetragonal phase. The thermal annealing on the films produces the conversion of the cubic crystalline phases to the tetragonal beta one and a crystalline reorientation of the latter phase. Two energy band gaps were determined for all the films: one indirect and other direct at higher energy. The structural modifications of the films are accompanied by changes in the two energy band gaps of the films. (C) 2004 Elsevier B.V. All rights reserved.
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